public static List <Teacher> TeacherList()
{
var result = (from teacher in SAADBContext.GetInstance().Teachers
let FullName = teacher.LastName + ", " + teacher.FirstName
select teacher
).ToList();
return(result);
}
public int GetStudentId(string studentno)
{
return(SAADBContext.GetInstance().Students.SingleOrDefault(t => t.StudentNo == studentno).StudentId);
}